The calculator shows temperature, however, humidity is a major factor especially as temps exceed 80 degrees.Is there any research or means to have the race predictor consider both heat and humidity or heat index?
This is important when training conditions are more extreme than race conditions (e.g., Training in 90 degree, 60+ percent relative humidity, 100+ HI. Race conditions 45 degrees, 20% humidity.),

Is there any research or means to have the race predictor consider sources of radiant heat such as the sun vs. overcast or ground (cooler in the morning until the sun warms)? We have all experience running in the sun and feel its warmth. On hot days, this radiant heat reduces cooling as does radiant heat from the ground. We run faster when the surface is cool, overcast conditions.